Integration of CCM 5.1 with Trixbox 2.6.1

I am using CCM 5.1 with IP phone 7906.and i have used Trixbox 2.6.1 with Dlink Phone GLV 515.Both the phones is working with their respestive call processing unit.Now i want to integrate Trixbox and CCM 5.1 so that call can be established between Dlink phone of Trixbox to IP Phone 7906 of CCM 5.1.